Flood-gate



UNITED STATES PATENT OFFICE.

WILLIAM DONNAN, OF BURGETTSTOWN, PENNSYLVANIA.

FLOOD-GATE.

SPECIFICATION forming part of Letters Patent No. 236,998, dated January25, 1881.

` Application led'July 28, 1880. (Model.)

To all whom tt may concern: l Be it known that I, WILLIAM DoNNAN, acitizen ot' the United States, residing at Burgettstown, in the countyof Washington and State ot' Pennsylvania, have invented a new and usefulIm provement in Flood-Gates, which has not been patented in any foreigncountry, nor used in this, as far as I know,) of which the following` isaspeciiication. v

This invention relates'to certain improvements in Hood-gates; and it hasfor its object to provide an improved means for returning the gate to anormal position after it has been depressed bypassing drift-Wood orother dbris. This I attain by the apparatus and mechanism illustrated inthe accompanying drawings, in

whichl.

Figure 1 represents a perspective view of my invention Fig. 2, avertical sectional view thereof; and Fig. 3, a detached sectional View,showin gamoditication ofthe journals and bearings of the gate.

The letter A indicates the tlood-gate, which is composed of a horizontalbeam, B, havingjournals G at its ends, and provided -with the pickets D,which stand vertically when the gate is in its normal position. Thejournal G have their bearings in the sills E, which a-re spiked to thebottom of the stream, at each side thereof.

The letters F Gr indicatethe springs by which the gate is returned toits normal vertical position after the passage of the drift-Wood. Thespring F is secured to a sill,-I, coniined to the bottom of the streamin any suitable manner, andprojects forward under the gate at one side,being curved upward, as indicated. The spring G is attached to theupright K, secured to the bea-m B, and curves outwardly toward its lowerend, which is adapted to bear and move against the spring F as the gateworks back and forth.

The various parts of the gate may be constructed of any suitablematerial, such as wood or metal, either in part or wholly, and thejournals may be secured to the side sills and have their bearin gs inthe end ot the horizontal beam, as indicated in Fig. 3 ot' the drawings.

The operation ot' myinvention is as follows: The pressure of drift-woodbearing upon the side of the gate swings it forward, causing the springG tobear against thespringF, the spring G moving against the curved faceof the spring F as the gate advances7 the two yielding together. Whenthe pressure is removed the springs operate simultaneously as a compoundspring, to return the gate to its normal vertical position, and hold ituntil again depressed.

Having thus fully described my invention, what I claim, and desire tosecure b v Letters Patent, is

The combination, with the flood-gate journaled in the sills secured tothe bed ot' the stream, ot the spring F, secured to a sill fastened tothe bed of the stream, and the spring G, secured to the gate, the twobeing adapted to operate together to return the gate to its normalposition, substantially as specified.

WILLIAM DONNAN.

Witnesses:

M. It. ALLEN, J P. DONNAN.

